Results
| Country: | U.S.A.
| | Station: | CHESTER ILLINOIS | | River: | MISSISSIPPI RIVER | | Area: | 1835165.22 | | Lat: | 37.9 | | Lon: | -89.85 | | Source: | USGS | | PointID: | 7020500 | | Area Units: | km2 | | Discharge Units: | m3/sec | | Starting Year: | 1942 | | Ending Year: | 1992 | | Total Years: | 51 | | Total Usable Years: | 50 | |
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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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| 1942 | -9999 | -9999 | -9999 | -9999 | -9999 | -9999 | 9163.75 | 4063.95 | 4781.8 | 4275.78 | 4588.3 | 4300.44 | -9999 |
| 1943 | 5675.91 | 4781.53 | 5275.18 | 8557.4 | 14172.2 | 14395.4 | 8791.06 | 4767.3 | 3047.1 | 2484.04 | 2835.95 | 2286.83 | 6422.49 |
| 1944 | 1972.51 | 2460.36 | 7175.16 | 12427.4 | 14653.6 | 11004.9 | 7962.56 | 4242.98 | 3981.56 | 3070.93 | 2610.36 | 2782.74 | 6195.42 |
| 1945 | 2094.18 | 3412.7 | 10100 | 16282.3 | 11330.5 | 14786.2 | 7458.33 | 4121.86 | 3600.51 | 4735.33 | 3057.2 | 2423.57 | 6950.22 |
| 1946 | 7375.21 | 4840.18 | 7969.87 | 7109.46 | 6018.73 | 6040.02 | 5547.39 | 4517.47 | 3302.05 | 3721.95 | 6965.04 | 3512.22 | 5576.63 |
| 1947 | 2934.55 | 3040.34 | 4822.29 | 14255.7 | 9935.61 | 16911.9 | 13196.6 | 3200.92 | 2810.37 | 2501.76 | 3052.67 | 2781.92 | 6620.39 |
| 1948 | 2725.01 | 2618.35 | 11048.2 | 9401.24 | 6081.76 | 4998.89 | 6991.56 | 4336.16 | 2332 | 2160.68 | 2769.31 | 2037.18 | 4791.7 |
| 1949 | 5116.06 | 7637.5 | 9537.35 | 9172.82 | 4847.69 | 7013.18 | 5824.17 | 3125.65 | 3376.9 | 4208.45 | 2363.43 | 3016.86 | 5436.67 |
| 1950 | 6819.83 | 5286.18 | 6730.31 | 9800.51 | 10954.1 | 8711.25 | 6534.83 | 5056.87 | 3721.7 | 3156.16 | 2549.85 | 1860.15 | 5931.81 |
| 1951 | 2383.74 | 5107.78 | 7659.29 | 12830.4 | 12158 | 10500.9 | 19166 | 7157.81 | 8947.23 | 5816.86 | 6991.47 | 4307.38 | 8585.57 |
| 1952 | 4586.44 | 6213.14 | 9459.71 | 14128.3 | 11433.7 | 6290.15 | 5795.85 | 4674.13 | 3007.36 | 2078.19 | 2316.61 | 2167.53 | 6012.59 |
| 1953 | 2015.44 | 3365.88 | 5539.17 | 7657.86 | 6412.43 | 5597.33 | 5353.74 | 4199.14 | 2546.45 | 2002.19 | 1934.9 | 1947.94 | 4047.71 |
| 1954 | 1589.59 | 1684.76 | 2496.19 | 4114.46 | 6053.44 | 6145.73 | 4881.58 | 3124.19 | 3013.12 | 4845.4 | 2891.54 | 2274.04 | 3592.84 |
| 1955 | 3269.79 | 3599.9 | 5722.77 | 5595.44 | 4466.78 | 4706.29 | 3683.95 | 2378.63 | 2123.02 | 3024.8 | 1987.76 | 1500.89 | 3505 |
| 1956 | 1445.35 | 1805.65 | 2442.39 | 4166.38 | 4315.15 | 3405.02 | 3501.26 | 3091.3 | 2160.96 | 1684.59 | 1679.76 | 1638.18 | 2611.33 |
| 1957 | 1635.81 | 2157.15 | 2981.78 | 6241.07 | 7810.01 | 7720.16 | 7033.58 | 3365.06 | 2739.76 | 2561.04 | 2679.73 | 2882.76 | 4150.66 |
| 1958 | 2448.05 | 2119.63 | 6029.69 | 4813.89 | 4156.66 | 5016.07 | 8926.25 | 7075.87 | 3481.76 | 2541.59 | 2678.69 | 1784.06 | 4256.02 |
| 1959 | 1757.21 | 4609.7 | 6564.98 | 7013.18 | 6400.56 | 5094.23 | 3856.32 | 3150.86 | 2978.19 | 5925.56 | 3602.96 | 2943.14 | 4491.41 |
| 1960 | 5331.82 | 4170.41 | 3866.73 | 15100.5 | 11451 | 8092.06 | 6289.11 | 3104.27 | 3255.79 | 2543.69 | 3156.97 | 2215.21 | 5714.8 |
| 1961 | 1769.26 | 2316.23 | 7478.43 | 8955.72 | 11290.3 | 5032.88 | 4269.75 | 3685.96 | 6688.48 | 5246.87 | 8723.52 | 3887.65 | 5778.75 |
| 1962 | 3756.11 | 7420.07 | 9297.11 | 11660 | 6839.93 | 7838.15 | 5379.32 | 3514.41 | 3937.01 | 3719.58 | 2703.24 | 1987.21 | 5671.01 |
| 1963 | 1558.99 | 1830.9 | 6112.54 | 4667.59 | 5541.91 | 3937.01 | 3034.67 | 2659.51 | 2106.5 | 1882.9 | 2046 | 1446.27 | 3068.73 |
| 1964 | 1353.83 | 1496.7 | 2384.2 | 5537.67 | 5287.97 | 5479.34 | 3262.58 | 2066.04 | 2972.06 | 2241.88 | 2372.4 | 1822.88 | 3023.13 |
| 1965 | 3364.7 | 3471.16 | 6804.3 | 11822.3 | 9693.55 | 7574.8 | 6354.88 | 3053.76 | 8459.23 | 6869.16 | 3845.45 | 4213.75 | 6293.92 |
| 1966 | 4292.31 | 5781.12 | 5627.77 | 7923.1 | 7881.26 | 6306.2 | 3554.33 | 2854.08 | 2377.12 | 2311.76 | 2354.84 | 2686.1 | 4495.83 |
| 1967 | 1964.38 | 3038.31 | 3558.99 | 8773.55 | 6140.22 | 9905.29 | 7564.29 | 3347.53 | 2634.24 | 3407.72 | 4871.47 | 5252.35 | 5038.2 |
| 1968 | 3068.56 | 5082.41 | 3435.67 | 5093.28 | 5460.61 | 5661.51 | 6088.15 | 5106.19 | 3260.7 | 4237.5 | 4947.92 | 4077.28 | 4626.65 |
| 1969 | 5318.48 | 7060.04 | 6930.36 | 12230.1 | 10388.7 | 7987.28 | 13828.7 | 5137.25 | 4280.59 | 6849.06 | 4074.82 | 2858.01 | 7245.28 |
| 1970 | 2217.5 | 3088.98 | 4478.65 | 8241.19 | 11033.6 | 9670.26 | 3694.73 | 4397.54 | 6106.28 | 6568.63 | 5979.61 | 4200.96 | 5806.49 |
| 1971 | 3229.23 | 5289.01 | 8650.38 | 7228.39 | 6061.66 | 6183.49 | 4571.83 | 3022.25 | 2668.59 | 2942.23 | 4166.37 | 5439.6 | 4954.42 |
| 1972 | 3391.01 | 2758.56 | 5217.64 | 7942.92 | 9224.04 | 5362.3 | 4474.09 | 6038.83 | 5834.25 | 5914.6 | 8942.51 | 4977.4 | 5839.85 |
| 1973 | 9151.87 | 8981.54 | 14963.2 | 20361.8 | 17698.1 | 11284.3 | 6587.81 | 4957.3 | 4362.71 | 10127.4 | 6559.16 | 7651.07 | 10223.9 |
| 1974 | 7921.45 | 9373.94 | 10026 | 8782.99 | 10697.4 | 12990 | 6917.57 | 3852.03 | 3460.62 | 2677.87 | 4817.95 | 3553.33 | 7089.26 |
| 1975 | 4531.63 | 6578.65 | 8089.53 | 9858.09 | 10674.6 | 7570.08 | 6310.12 | 3779.86 | 4551.49 | 3357.85 | 3775.6 | 4441.2 | 6126.56 |
| 1976 | 2819.46 | 3869.37 | 7811.84 | 8198.71 | 7977.17 | 4088.97 | 3084.36 | 2304.82 | 1869.77 | 2028.96 | 2052.32 | 1760.68 | 3988.87 |
| 1977 | 1418.59 | 2068.35 | 3734.28 | 3901.14 | 3611.24 | 3363.02 | 3697.74 | 3367.44 | 6208.03 | 6269.93 | 6990.52 | 4381.83 | 4084.34 |
| 1978 | 3160.72 | 2292.16 | 9111.5 | 12676.6 | 10590.6 | 6227.85 | 8046.59 | 4692.4 | 5333.03 | 3968.95 | 3931.34 | 3346.98 | 6114.89 |
| 1979 | 2230.65 | 3793.87 | 12853.2 | 16777.8 | 11698.6 | 6791.36 | 6011.43 | 5614.07 | 4999.84 | 2857.92 | 4312.68 | 3685.14 | 6802.21 |
| 1980 | 3109.21 | 3010 | 5118.07 | 8376.17 | 3917.79 | 7040.55 | 3184.2 | 3745.33 | 5202.78 | 3761.59 | 3107.98 | 3103.45 | 4389.76 |
| 1981 | 1983.47 | 2513.64 | 3455.5 | 5204.66 | 7813.67 | 7551.2 | 10122.9 | 7202.57 | 4687.41 | 4267.65 | 4532.61 | 3640.84 | 5248.01 |
| 1982 | 2914.46 | 8221.03 | 10482.8 | 10389.5 | 9538.26 | 12369.8 | 9319.95 | 5734.65 | 5792.71 | 4686.92 | 6667.71 | 14160.3 | 8356.51 |
| 1983 | 6884.69 | 6089.17 | 9630.52 | 16844.8 | 14457.2 | 8998.2 | 7686.7 | 4041.11 | 3459.49 | 4190 | 6313.75 | 6886.51 | 7956.85 |
| 1984 | 4099.57 | 6763.86 | 11507.7 | 14963.7 | 13955.7 | 12626.5 | 10541.2 | 4409.23 | 3505.83 | 4608.36 | 7706.94 | 5578.45 | 8355.59 |
| 1985 | 6537.57 | 6279.29 | 14427 | 10651.9 | 7472.95 | 7648.42 | 4263.08 | 4304.18 | 4076.7 | 8005.49 | 10770.8 | 8665 | 7758.53 |
| 1986 | 4506.06 | 6532.12 | 7477.52 | 9585.3 | 10837.2 | 8469.62 | 9089.76 | 5488.93 | 6482.7 | 16658.6 | 9426.73 | 7748.81 | 8525.28 |
| 1987 | 4288.66 | 4699.61 | 6896.56 | 9197.36 | 5974.89 | 5424.59 | 4672.31 | 4257.32 | 4304.18 | 2848.87 | 3282.6 | 6586.9 | 5202.82 |
| 1988 | 5118.98 | 5878.22 | 5835.13 | 7218 | 3887.83 | 2294.81 | 1955.33 | 1970.32 | 2079.79 | 2143.69 | 2700.31 | 2349.85 | 3619.36 |
| 1989 | 2715.33 | 2516.57 | 4113.91 | 5594.5 | 3601.74 | 4008.93 | 2616.95 | 2493.36 | 4896.76 | 2252.94 | 2062.61 | 1532.04 | 3200.47 |
| 1990 | 2025.12 | 3170.7 | 7254.63 | 5321.71 | 11539.6 | 12133.8 | 8431.16 | 6447.14 | 4335.33 | 3270.25 | 3039.07 | 4143.42 | 5925.99 |
| 1991 | 4836.73 | 4898.84 | 6085.41 | 9529.61 | 10741.3 | 9662.7 | 5359.22 | 3557.35 | 3051.16 | 3115.6 | 4565.64 | 5945.66 | 5945.77 |
| 1992 | 4010.05 | 4436.98 | 6840.84 | 8128.87 | 6325.65 | 3731.24 | 6454.45 | 5799.5 | 5076.95 | -9999 | -9999 | -9999 | -9999 |
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| Avg | 3614.5 | 4390.25 | 7022.24 | 9406.15 | 8610.14 | 7632.88 | 6478.2 | 4150.13 | 4005.29 | 4132.59 | 4247.14 | 3813.48 | 5625.52 |
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| Std Dev | 1860.97 |
2011.72 |
2936.62 |
3770.94 |
3376.4 |
3228.27 |
3108.91 |
1282 |
1557.42 |
2506.27 |
2198.36 |
2288.54 |
1653.77 |
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| | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Avg Annual |
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